Crank-pin tool



Jan. 8, 1924. 1,480,401

G. F. KRIEGER CRANK PIN TOOL Filed Aug. 18.. 1922 INVZENTOR. 62 071947/5 2709??? A TTORNE Y.

Patented Jan. 8, 1924.

UNITED STATES 1,4 0,401 PATENT orifice,-

enonen r. Karnsnn, or isconsin RAPIDS, VTISCONSIN.

: CRANK-PIN "root.

Application filed August is, 1922.. Serial No, 532,775.

To all whom it may concern:

Be it known that I, GEORGE F. KRIEGER, a

citizen of the United States, residing at crank pins of internalcombustion engine shafts, particularly those of motor vehicle engines,and further for refinishing scored and worn crank pins of the crankshafts thereof, and, in the latter instance, in'a manner not requiringthe removal of the crank shaftfrom its operative position. in the engineassembly.

A further object of the invention is to provide a tool, of'such class,ina manner as hereinafter set forth, with means for automaticallycentering a crank pin within the jaws'of the tool simultaneously withthe adjustment ofthe cutter-carrying head block to operative position.

Further objects of the invention are to provide a tool of such class,which is simple in its construction and arrangement, adjustable, strong,durable, compact, efficient and convenient in its use, readily set upginoperative position, and comparatively inexpensive. V

With the foregoing and other objects in view, the invention resides inthe novel construction, combination "and arrangement of parts, ashereinafter more specifically described, and illustrated in theaccompanying drawings, wherein is shown an embodiment of the invention,but it is to be understood that changes, variations and modificationscan be resorted to, which come within the scope of the claims hereuntoappended.

In the drawings, wherein like reference characters denote correspondingparts throughout the several views Figure 1 is a front'elevation of acrank pin tool in accordance with this invention, 7

Fig. 2 is a side elevation thereof, Fig. 3 is a sectional elevationpartly broken away,

Fig. 4 is a section on the line4-4ofFig. 2, Fig. 5 is a section on theline 5-5 of Fig.2,

Referring to the drawings in detail, the tool includes a handle member10, which terminates in a threaded shank 11, the latter merging into thestem 12, of the fixed jaw of the tool, to be hereinafter referred to.

The stem 12 issquare in cross section, and the shank 11 cylindrical, aswell as being peripherally threaded. Mounted on the shank 11, is anadjusting "nut 13, which is employed for adjusting the position of themovable jaw of the-tool, to be hereinafter referred to V I Thestationary jaw of- 'the to0l,=includes the stem 12, which is; somewhatelongated, and which merges at its outer end in afor- 6 is a top planview of the stationary aw.

wardly projecting curved jaw body, and V "which is bifurcated. Theforwardly projecting curved jaw body, is indicated at 14, and thefurcation, dueto the bifurcation of the jaw body 14, is indicatedby thereference character'lb. The inner face of the curved jaw body 14, in.proximity to the forward end thereof, is provided with a dovetail groove16, in which is seated, a transversely extending triangular shapedabutment member 17, which is of a length element 18, which is formed ofan absorbent fabric and is saturated with a lubricant. A

pin '19 extends through-the aw body 14, at

the forward end thereof, for the purpose of 'detachably securing thelubricating elegreater than the width of thejaw body 14,

ment or member 18, in position. The mem-- ber' 18 projects inwardly fromthe jaw body 14, soas to come in contact with the work operated on.

mounted on the stem 12 of the stationary jaw,and which is furtheradjustedbythe 13,so that when the latter is adjusted-length wise of theshank 11, the sleeve 20 can -be moved correspondingly. Theiforward end100 The adjustable jaw, whi h is slidably of the sleeve terminates in ajaw body coupling member, which is formed with a squared bore 22, and ismounted on the stem 12. 'The coupling member is indicated at- 23, and isof greater thickness than the thickness of the body of the sleeve 20.The member 22 has a port 24, for the purpose of supplying a lubricant tothe interior thereof, so that the member 23, as well as the sleeve 20,will freely slide on the stem 12, of the stationary jaw. Projectingforwardly from the member 23, as well as formed integral. therewith, isa neck portion 25, which carries the adjustable jaw body 26. The member23, neck 25, and jaw body 26, has that portion opposing the jaw body 14,cut away to provide a V-shaped jaw, and the working faces of the latterare indicated at 2?, 28.

At the point of jointure, between the working faces 27, 28, of theadjustable jaw, the jaw body 26 is formed with-a transverse- 1yextending pocket 29, for the reception of a cutter 30. The jaw body 26below the pocket 29, centrally thereof, is formed with a socket 31,having the wall thereof threaded. Thesocket 31 extends parallel withrespect to the stem 12 of the stationary jaw. Disposed at right angleswith respect to the pocket 29, is a bore 32, which extends through therear of the jaw body 26, neck 25, and the forward portion of the member23, and said bore is in alignment with the port 24. Mounted in the bore32, isa cylindrical clamping element 33, which abuts against the cutterand clamps the same against the forward wall of the pocket 29. Theclamping element or member 33 is secured in clamping position throughthe medium of a threaded retaining member 34, the latter being disposedat right angles with respect to the member or element 33 and abutsagainst the rear end of the said member 33. The retaining member '34 hasthreaded engagement with a pocket 35, which is disposed at right angleswith respect to the bore 32. The pocket 35- is formed in the neck 25,and which terminates at its outer end in a recess 36, at one side of theneck 25and which is of a size to receive an operating element 37, forthe retaining or securing element or member 34. The rear end of themember or element 33 is tapered as at 38, and which is engaged bythetapered inner end 39 of the element 34. and by this arrangement, whenthe element 34 is screwed inwardly, the pointed inner end 39 hearingagainst the pointed inner end 38 of the elementf33, will force theelement 33 forwardly, thereb clamping the cutter 30 against the forwardwall of the pocket 29.

The clamping of the cutter 30 in the position just referred to, is hadsubsequent to the adjusting of the cutter 30, to the position desiredfor operation upon the work.

of an adjusting screw 44, which adjustably I engages with. the threadsof the wall of the socket 31, is the base of the member The base of themember 43, is indicated at 45,, and which is provided with an opening45, for the passage of the screw 44. The flanges 42 are apertured andthe walls are threaded so that engagement of the screws 40, 41, with theflanges 42,.will be had. The slits 49 are provided for the purposeofadjusting the screws 40, 41, when occasion requires. Interposedbetween the aw body 26, and the base 45, of themember 43, as well assurrounding the screw 44, is a coiled spring50, which is employed forimparting tension, not only to the member 43, but to the ad justingscrew 44, so that during the operation of the adjusting of the screw 44,or the member 43, such action will be had against the tension of thespring 50. The head 46 is tapered, and provided with a micrometer scale47, and further provided with squared portions 48, for engagement by atool for the purpose of adjusting the head 46, when occasion sorequires. The scraper or cutter 30, can be adjusted independently of themember 43, or the screw 44, by the adjusting of the screws 40, 41.;

The working face 28 of the V-shaped jaw of the adjustable jaw body, isprovided with a pocket 51, inwhich is mounted an absors bent orlubricant element 52, which consists of a body of absorbent material,saturated with a suitable lubricant, and said element 52 is secured tothe jaw body, through the medium of a wire 53, passing through anopening 54, in the jaw body 26, and bent at its outer end, so as to abutagainst the jaw body 26, under such conditions retaining the element 52in the socket or recess 51.

The V-shaped jaw of the adjustable jaw body 26, provides for-centeringthe work,

when it is desired to beoperated on and said I V-shaped jaw, inconnection with the abutment 17, when the adjustable jaw has beenshifted to its desired point of adjustment, will securely hold the workduring the operation thereon, of the cutter or scraper 30. r

By providing the elements 35, 37, and 33, the cutter or scraper '30, canbe securely clamped in position, after being adjusted for operativeengagement with the work supported by the V-shaped jaw of the adjustable jaw body 26.

After clamping the work in position, and adjusting the cutter, orscraper .30, the tool is revolved around the work, and the cutter 30,acting on the face of the work will finish or round the work in themanner desired,

and duringthe operation or-rather revolving the tool, the necessaryamount of lubricant will be supplied so as to set up a satiswill .bereadily apparent that a' crank pin tool'is set upfwhich provides fortheaccurate finishing or rounding of the crank pins of engine shafts, aswell'as a tool for refinishing scored and worn crank pins, and althoughthe description and drawings set forth the preferred embodiment of thetool,

- yet it is to be understood that the specific terms and details ofconstruction, arrangement and operation and various changes in andmodifications of the same can be resorted to without departing from thespirit of the invention.

What I claim is l. A tool for the purpose set'forth comprising anadjustable jaw body provided with a V-shaped jaw, an adjustable cutterpositioned at the point of jointure between the working faces of saidV-shaped jaw, means arranged exteriorly of said jaw body for adjustingsaid cutter, means arranged within said jaw body for clamping saidcutter in adjusted position, and a lu-- bricating element mounted in oneof the working faces of said V-shaped jaw and means carried by said jawbody for securing said lubricating element thereto.

2. A tool for the purpose set forth comprising an adjustable jaw bodyprovided with a V-shaped jaw, a cutter mounted in the jaw body andprojecting between the working faces of said jaw, adjustable supportingmeans exteriorly of therjaw body for adjusting said cutter, and meansadjustably connected with the jaw body and connected with saidadjustable supporting means for adjusting the cutter independent a ofthe adjusting of the said adjustablesup porting means. j r

3. A tool for the purpose set'pforth comprising an adjustable jaw bodyprovided with a V-shaped jaw, a cutter mounted in w the jaw body andprojecting between the working faces of said jaw, adjustable supportingmeans exteriorly ofthe jaw body for adjusting said cutter, meansadjustably connected with the jaw body and connected with saidadjustable suporting means for adjusting the cutter independent of theadjusting of the said adjustable supporting means, and releasable meansmounted in said jaw body for clamping said cutter in position.

4. A tool for the purpose set forth comprising an adjustable jaw bodyprovided with a V-shaped jaw, a cutter mounted in the jaw body andprojecting between the working faces of said jaw, adjustablesupporting'means exteriorly' of the jaw "body for adjusting said cutter,means adjustably connected with thejaw body and connected withsaidzadjiustable supporting means for adjusting the cutter independentof the ad justing of the said adjustable supporting means,releasable'means mounted in said jaw body for clamping said cutter inposition,

and a lubricating element mounted in one 7 'of the working faces of saidV-shapedj'aw and connected with said jaw body.

5. A tool for the purposeset forth como'risin 'a stationar 'aw 'alubricatin element carried by said jaw and projecting inwardlytherefrom, an adjustable, jaw body provided with a .V-shaped jaw, and a111? bricating-element mounted in said V-shaped jaw and connected withsaid'adjustable jaw body.

. '6. A tool for the purpose set'forth comrising a stationary jaw, alubricating element carried by said jaw and projecting inwardlytherefrom, an adjustable jaw body provided with a V-shaped jaw, alubricating 1 element mounted in said V -shaped jaw and connected withsaid adjustable jaw body,

and an adjustable cutter mounted in said jaw body andextendingbetweenthe workin faces of said V-shaped jaw.

A' tool for the purpose set prising a stationary jaw, a lubricatingelement carried by said jaw and projecting inwardly therefrom, anadjustable jaw body provided with a V-shaped jaw, a lubricating elementmounted in said V-shaped jaw and connected with said" adjustable jawbody, an adjustable cutter mounted insaid ijaw body'and extendingbetween the working faces of said V-shaped jaw, and means mounted insaid jaw body for clamping said cutter-in adjusted position.

8. A toolfor the purpose set forth com prising a stationary jaw, anadjustable V--' shaped jaw, a cutter projecting between theworkingfacesf of said V-shaped aw, means" for clamping said cutter inadjusted posi-' 'tion, and means adjustably connected-with the V-shapedjaw and engaging said cutter eXteriorly of the jaw for adjusting thecutter.

9. A tool for the purpose set forth comforth comprising a stationary jawprovided .on'its inner face with a transversely extending V- sha pedabutment, an adjustable jaw body provided with a V-shaped jaw opposingsaid abutment, an adjustable cutter mounted in said adjustable jaw bodyand extending between .the working faces. of said V -shaped jaw,releasable means mounted in said jaw body for clamping said cutter inadjusted position, and means adjustably connected with said jaw body andengaging said cutter, exteriorly of the jaw body, for adjusting andsupporting said cutter.

10. A tool for the purpose set forth comprising a stationary jawprovided on its in- 'ner face with a transversely extending V- shapedabutment, an adjustable jaw body provided with a Vshaped jaw opposingsaid abutment, an adjustable cutter mounted in "said adjustable aw bodyand extending be said jaw body and engaging said cutter, (EX- terioriyof the jaw body, for adjusting and supporting said cutter, and alubricating element carried by said fixed jaw and adjustable jaw body.

11. A tool for the purpose set forth comprising a stationary jawprovided on its inner face with a transversely extending V- shapedabutment, an adjustable jaw body provieed with a V-shaped jaw opposingsaid abutment, an adjustable cutter mounted in said adjustable jaw bodyand extending between the working faces of said V-shaped jaw, releasablemeans mounted in said jaw body for clamping said cutter in adjustedposition, means adjustably connected with said jaw body and engagingsaid cutter, ex, teriorly of the jaw body, for adjustingand supportingsaid cutter, and means for imparting tension to the said adjusting andsupporting means for said cutter.

In testimony whereof, I aflizc my signature hereto.

GEORGE F. KRIE GER,

